Type of the signature. Posible values are 'simple' and 'biometric'.

Send type of the signature. Posible values are 'email' and 'sms'.

Send address of the signature. If included, this field must be a verified identity of the user.

Email address to notify when signature is completed.

If this field is present the signer can upload attachments to the signature. Content of this field is the label for the attachments.

Subject of the signature email. Only applicable on email send type.

Body of the signature email. Only applicable on email send type.

Footer of the signature email. Only applicable on email send type.